The theory is that the Evans coolant will never boil, and, therefore, you'll never get a point within the engine that gets significantly hotter than the coolant due to the loss of coolant at that location.

But, whether the use of Evans coolant at elevated temperatures on an aluminum head is a wise idea is something for which there is very limited information.

You'll definitely run warmer with Evans installed. It's got about 75% of the heat transfer capability of plain water.

PEH is running the Evans in one or more of his vehicles. Maybe he'll comment on it.